Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see
Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to
www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Enhanced Object Tracking and IPv6 Route Tracking

Enhanced Object Tracking (EOT) provides complete separation between
the objects to be tracked and the action to be taken by a client
when a tracked object changes. Thus, several clients such as Hot Standby Router Protocol (HSRP),
Virtual Router Redundancy Protocol (VRRP), or Gateway Load Balancing Protocol (GLBP) can register interest with a tracking
process, track the same object, and each take different a action when
the object changes.

Each tracked object is identified by a unique number that is
specified on the tracking CLI. Client
processes use this number to track a specific object.

A tracking process periodically polls tracked objects and
notes any change in value. The changes in the tracked object are
communicated to interested client processes, either immediately or
after a specified delay. The object values are reported as either
up or down.

The up keyword specifies the up threshold. The state is up if the scaled metric for that
route is less than or equal to the up threshold. The default up
threshold is 254.
The down keyword specifies the down threshold. The state is down if the scaled metric for that
route is greater than or equal to the down threshold. The default
down threshold is 255.

Step 7

end

Example:

Device(config-track)# end

Returns to privileged EXEC mode.

Step 8

showtrackobject-number

Example:

Device# show track 6

(Optional) Displays tracking information.

Use this command to verify the configuration.

Tracking IPv6-Route Reachability

Perform this task to track the reachability of an IPv6 route. A tracked object is considered up when a routing table entry exists for the route and the route is accessible.

SUMMARY STEPS

1.tracktimeripv6route {seconds |
msecmilliseconds}

2.trackobject-numberiprouteip-address/prefix-lengthreachability

3.delay {upseconds [downseconds] | [upseconds]
downseconds}

4.ipv6vrfvrf-name

5.end

6.showtrackobject-number

DETAILED STEPS

Command or Action

Purpose

Step 1

tracktimeripv6route {seconds |
msecmilliseconds}

Example:

Device(config)# track timer ipv6 route 20

(Optional) Specifies the interval that a tracking process polls the tracked object.

The default interval that the tracking process polls IPv6-route objects is 15 seconds.

Note

All polling frequencies can be configured down to 500 milliseconds, overriding the minimum 1-second interval configured using the
msec keyword and
milliseconds argument.

Step 2

trackobject-numberiprouteip-address/prefix-lengthreachability

Example:

Device(config)# track 4 ipv6 route 2001:DB8:0:AB82::1/10 reachability

Tracks the reachability of an IPv6 route and enters tracking configuration mode.

Step 3

delay {upseconds [downseconds] | [upseconds]
downseconds}

Example:

Device(config-track)# delay up 30

(Optional) Specifies a period of time (in seconds) to delay communicating state changes of a tracked object.

Note

The up keyword specifies the time to delay the notification of an up event.
The down keyword specifies the time to delay the notification of a down event.

Technical Assistance

Description

Link

The Cisco Support website provides extensive online resources,
including documentation and tools for troubleshooting and
resolving technical issues with Cisco products and technologies.

To receive security and technical information about your
products, you can subscribe to various services, such as the
Product Alert Tool (accessed from Field Notices), the Cisco
Technical Services Newsletter, and Really Simple Syndication
(RSS) Feeds.

Access to most tools on the Cisco Support website requires a
Cisco.com user ID and password.

Feature
Information for Object Tracking: IPv6 Route Tracking

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to
www.cisco.com/​go/​cfn. An account on Cisco.com is not required.